Feed roller



April 30, 1940. w. RcsELlus Er AL 2,199270 FEED ROLLER Filed Jan. 16. 1957 E A iORNEY Patented Apr. 30, 1940 I i f l UNITED STA-Tes PATENT oFFII'cE FED ROLLER Louis W.Rose1ius, New York, and Anthony F. Peropat, Brooklyn,'N. Y., assignors to S. & S. Corrugated Paper Machinery Co., Inc., Brooklyn, N. Y., a corporation of New York Application January 16, 1937, Serial No. 120,886

` 3 claims. (c1. zul- 2.3)

This invention relates to feed rollers for sheet i A further object of the invention is to provide material, and more particularly relates tofeed novel positiveA feeding means for corrugated Y rollers for printer and printer-slotter machines blanks containing score lines. used in the manufacture of corrugated and fibre These and other objects of the invention will 5 board containers. become apparent in the following description -5 Corrugated and fibre board containers are taken in connection with the drawing, in which: manufactured from sheet material automatically Figure 1 is a schematic illustration of a single cut to size and shape, and scored or creased at pair of feed rollers operating on corrugated predetermined lines so that the blank may be board. Y

l folded up and pasted into final form. The cut- Figure 2 is a schematic diagram of the princi- 10 ting, shaping and creasing operations are generple of adjacent feed roller pairs as used in the inally performed prior to printing operations upon vention. y

the blank. The printing may be multi-colored or Figure 3 is an end view of a preferred arrangeof a single color. Accurate registration of sucment fOr SYIlChIOIlOllSly driving pairs 0f feed l cessive printing operations upon the blankis esrollers for a printer machine. l5

sentia] for quality work. Even a small amount of Figure lis a diagrammatic view of the prior slippage or irregular feeding of the corrugated art feed roll mechanism for advancing the corsheet will cause poor registration of the printing. rugated sheet I0. This arrangement essentially To accomplish positive feeding of the corrucomprises two opposed pressure or feed rollers I I :zo gated boardthrough printer, printer-slotter nia-'- and I2 of equal diameter positively geared to ro- 2o chinery or thev like, a pair of coacting feed rolls tate at identical speeds.

havehereto-fore been employed. To predeter'- Rollers II and I2 are driven Iby shafts I3 and mine the foldedlines in the blank, creases or I4 respectively. i The distance between shafts I3 score lines are made in the corrugated board. and I4 is adjustable to control the-pressure of These score lines are regions of diminished thickthe rollers II and I2 upon the blank I0. There 25 ness. A score line parallel to the axis of the feed is schematically illustrated one forrnof pressure rolls resulted in slippage when the score line contro-lling means at 9, it being understood that reached the position between them due to the other methods for effecting this adjustment may materially reduced pressure: at the region of debe used. f

3U creased thickness inthe blank. It was the gener-y If the pressure is adjusted so that corrugatedy 30 al .practise to adjust therollers closer togethersheet I0 is not normally crushed, feeding diiithan necessary for normal feeding so asto avoid f culties are encountered due to vslippage at score slippage when the scored region passed between i vlines such'as I5 arranged in blank I0 parallel to the feed rolls. The abnormal closenessof the -the axis of rollers II and I2. The sudden def5 feed rolls caused crushingv o-f the corrugated crease in cross-'section of` corrugated board l0 35 board structure. affects the positive gripping action .on vthe sheet In accordance with the present invention, an by rollers II-IZ so as to cause slippage or other-l auxiliary pair of feed rolls is located near the regvvise uneven feeding of sheet I0. The printing y ular pair. Two'sets of adjacent feed rolls are ad; Acylinder containing the; type must accurately reg- 40 justed to an operating pressure corresponding to ister upon blank IB, particularly in multi-color 40 the normal board thickness to avoid any crushing Printing maChIleS- A' pail' 0f 10-11615 Such als` of the corrugated board. Both Asets of rolls are `II--IZ is generally provided at the input and' out; driven in synchronous speed relation. When a let of the printing units to perform the feeding score line passes between one set of rollers, the operation. Slippage at' one pair of rollers may v other set of rollers continue to advance the sheet cause buckling or wrong positioning of the sheet 45 in a positive mannenNo slippage occurswith this between such relatively widely separated' single arrangement since when one set of rolls tends to pairs of feeding rollers to' interfere with the slip, the other setl continue the positive feeding printing registration on the sheet. 1 action. Figure 2 diagrammatically illustrates the im;

5o yItrisacccrdingly an objectl of this invention to proved feeding mechanism as practised by the 50v provide'novel methodsof and 4means for feeding present invention. Two closely situated pairs of sheet material. feed rollers IB-Il and I8-I9 are arranged to` Another object of the invention is toy provide Operate upon the advancing corrugated blank` I0. novelarrangements of feed ollersfor corru- The transverse score line I5 in sheet I0 is shown 5s gatedboard machinery: situated between roller pair I6-Il corresponding 55 CII to rollers H-IZ of Figure 1. The pair of rollers lf3-i9 preferably similar to the pair IS-I'I are located adjacent thereto and on either side thereof. The two pairs of rollers may be considered as a roller group replacing the single pair of rollers |I-I2 heretofore used.

The roller pairs IE-II and l8-i9 are secured respectively to shafts 20, 2i, 22 and 23 rotated in synchronous relation to positively feed sheet lil in a predetermined direction. The distance between shafts 2--2l and shafts 22-23 may be adjusted by means Well known in the art to cause a predetermined ,gripping pressure upon blank I0 by both roller sets. The gripping pressure of the rollers is such as to avoid crushing of the corrugated sheet lil and yet permit a positive feeding action.

It is preferable to operate the pressure or Vdis'- tance adjustment of both pairs of adjacent rollers simultaneously and from a unitary control so as to insure uniform action thereof. A common control arm 24 connected to vthe upper rollers Iii-il 8 for lifting or lowering them in unison with respect to the stationary axes of the lower rollers il' and i9 is schematically illustrated. It is to be understood that the unitary control may be used forthe lower rollers instead of or together with the upper ones. Any of the several means well known in the art for variably vseparating a single pair of rollers may here be combined with the common control arm 24 for the simultaneous adjustment. VThus there is illustrated in Figure 2 schematically mechanism for vertically adjusting the position of the upper rollers i6 and i3 with respect to the corresponding rollers l? and It. The common yoke 2li connects the upper rollers It and i8 "at their respective shafts 2li and 22 so that any movement imparted to one roller is similarly imparted to the other roller. An arm ft2 extends from the yoke 2li-through a portion of the frame til. A nut 4l coacts with a threaded portion of the rod 52 to Variably position the control arm 2li. A spring E3 mechanically biasesI the yoke 215 downwardly with respect to the frame 60, as shown. The rollers i6 and i3 are accordingly in a suitable operating position and their distance of separation from the lower rollers is determinedb'y a predetermined adjustment of the nut 4i upon"the threaded 'portion d2, as will now be evident.

The auxiliary roller pair E8-i9 being located adjacent to roller pair lB-I'l maintains a positive grip upon blank I 0 while roller pair i'G-i'l Vis engaging the scored region l5 of blank It. The blank Hl is accordingly continuously advanced without interference since'theroller pair lll-I9 acts independently of the other pair in feeding the sheet. In a similar manner when the score line I5 has reached the position between rollers Iii-IS, -the rst roller pair It-il will have a` positive gripupon sheet I0 to continue its steady progress through the apparatus. No siippage., buckling or uneven feeding of the corrugated blank Il) occurs 'by using the dual pair of feed rollers,

Figure Sis an end View of a machine for operating upon corrugated board sheet ID employing the positive feeding roller groupsof the present invention. The primary utility of this invention is for machines for printing upon the blank, particularly'for'multi-color printing where accurate registration is necessary. A printing drum is illustrated at 38 having a pres-'ser roller 3i cooperating with drum 3B to maintain a predetermined pressure for printing upon blank i6).

forms as practised in the art.

At the input and output positions of drum 30 is shown a group of rollers for positively feeding the blank.

The feed rollers i6 to I9, arranged in two adjacent pairs in accordance with the illustration of Figure 2, are driven by respective gears 25 to 23 attached to their shafts 20 to 23 respectively. Gear 25 meshes with gear 26 and gear 2l meshes with gear 28. The lower gears' 26 and 28 are shown meshing `with a driver gear 28 which is connected to the power gears of the machine. By using gears 25 to 28 of the same diameter, the peripheral Speeds of the equi-diameter rollers IB to I9 will be synchronously maintained. The feed roller groups on opposite sides of drum 3U are similar in construction and are rotated so as to accurately move corrugated boards I9 between drums 30 and 3| at a predetermined rate. The drive gear 29 for each group are driven at the same speed by interconnecting gears not shown ,1:

but Well known to those skilled in the art.

Although we have illustrated a preferred drive gear arrangement for the roller groups l5 to IS, it is to be understood that the driving arrangement for the rollers may take many different Various' compensating arrangements to accommodate the variable separation within the roller pairs for different sheet'thicknesses are used for the gear drives of food rollers. ployed for the dual Yroller pairs i-l'i and I'S-i S, in conjunction with a common pressure control arm as' described in connection `with arm 24 of Figure 2.

It is to be understood that the feed rollers of rality of pairs of feed rollers may be used in any ,f

oneV machine; Vin fact, may be used to replace 'the prior art feed rollers applied to any machine. Thus, for example, although a single printing drum 'is illustrated in Figure 3 with an Such arrangements may be ern- :u

input and output feed 'roller set, it is to be underi 1. Means forv feeding a sheet of corrugated board material having `a transverse score line comprising a first pair of coacting rollers for normallyadvancing said sheet, a second Vpair of coacting rollers normally vii'i'dependently capable ly adjusting the distance between the rollers of said vpairs to accommodate different sheet thicknesses, said means comprising 'a yoke 'in which corresponding 'rollers of said pairs are journalled, and 'means for confining said yoke to movement normal to the plane of said corrugated board, said rollers lbeing driven 'atsynchronous peripheral speed to positively advance said sheet irrespective of said score line (reaching either pair of rollers.

2. Means for feeding a sheet of corrugated board having a transverse score line comprising a rst pair of `coacting rollers arranged to grip upon opposite faces of said sheet for normally advancing said sheet, a second .pair of coacting of advancing said sheet, means Afor simultaneousrollers normally idependently capable of advancing said sheet located adjacent said rst pair of rollers, and arranged to grip upon opposite faces of said sheet, means for simultaneously and substantially equally adjusting the distance between the rollers of said pairs to accommodate different sheet thicknesses, said means comprising a yoke in which corresponding rollers of said pairs are journalled, and means for confining said yoke to movement normal to the plane lol.

said corrugated board, a source of motive power,

and means controlled by said source for rotating said rollers at synchronous peripheral speed to positively advance said sheet irrespective of said score line reaching either pair of rollers.

3. In a machine for operating upon an advancing corrugated board sheet having a transverse score line, a rotatable drum, means for feeding said sheet past said drum comprising a rst pair site faces of said sheet for normally advancing f said sheet, and a second pair of coacting rollers located adjacent said rst pair of rollers and arranged to grip upon opposite faces of said sheet, means for `simultaneousluy adjusting the distance between the rollers of said pairs lto accommodate different sheet thicknesses comprising a common yoke for corresponding rollers of said pairs, and means for conning said yoke to vertical movement with respect to said corrugated board, a source of motive power, and means controlled by said source for rotating said rollers at synchronous peripheral speed to positively advance said sheet irrespectiveof said score line reaching either pair of rollers.

LOUIS W. ROSELIUS. ANTHONY F. PEROPAT. 

